In an audience of 4000 people, 2 people are chosen, at random, to appear on stage. How many ways can the people be chosen?

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Answer to a math question In an audience of 4000 people, 2 people are chosen, at random, to appear on stage. How many ways can the people be chosen?

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4000C2=\frac{4000!}{\left(4000-2\right)!\times2!} 7998000 number of ways

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ind the z-score for which 72% of the distribution's area lies between -z and z. -1.7417, 1.7417 -1.1538, 1.1538 -1.0803, 1.0803 -2.826, 2.826